Spool Performance - FX350 Upgraded High Pressure Fuel Pump || S58

Spool Performance FX-350 High-Pressure Fuel Pump (HPFP) Kit – BMW S58 Platform

Unlock the full potential of your S58-powered BMW with the most advanced high-pressure fuel solution on the market — the Spool Performance FX-350 HPFP Kit. Delivering up to 50% more fuel than OEM, this dual-pump setup is engineered for high-horsepower builds and direct injection-only fueling strategies, especially on E85 or ethanol blends.

🔥 Game-Changing Fuel Delivery at 390 Bar

The FX-350 is capable of sustaining fuel pressure up to a groundbreaking 390 bar (39 MPa / 5600 psi) — far beyond stock capacity. Designed to keep up with the most demanding boost and RPM conditions, this kit is tailored for the S58’s twin HPFP layout and is fully E85 compatible.

⚙️ Engineered for Power & Precision

Built using DLC-coated (Diamond-Like Carbon) internals and high-tolerance stainless steel construction, the FX-350 isn’t just high-pressure capable — it’s built for long-term, high-output reliability. Whether you're chasing records or pushing your street car to new limits, this pump delivers consistent volume at maximum pressure.

🔩 Plug-and-Play Simplicity

No fabrication or guesswork needed. The FX-350 kit includes everything required for a direct-fit installation:

• ✅ (2) FX-350 HPFPs

• ✅ (2) Custom CNC Mounting Brackets

• ✅ (1) Pump Alignment Tool

• ✅ (1) Triple-Layer Low Pressure Fuel Line

• ✅ (1) Plug-and-Play HPFP Adapter Harness

• ✅ (1) Pre-Bent HPFP Hardline for Seamless Fitment

🛡️ Lifetime Warranty Backed

The FX-350 is covered by Spool Performance’s Lifetime Warranty, reflecting our unwavering confidence in its engineering. Note: A properly upgraded low-pressure fuel pump (LPFP) is required to prevent cavitation — damage caused by inadequate fueling upstream is not covered.

✅ Vehicle Compatibility:

• BMW G87 M2

• BMW G80 M3 / G82 M4

• BMW F97 X3M / F98 X4M

• BMW G20 Alpina B3

(All with S58 engine platform)

🔧 Recommended Pairings:

• IFX350 Gen2 DI Injectors – For full DI-only high-power support

• Spool Stage 3 LPFP Kit – To prevent cavitation and ensure max performance

💥 Key Benefits:

• 🚀 Supports Big Power Builds (E85 / High Boost / DI Only)

• 🧊 Cold-Start Compatible and Street-Ready

• 🧰 Fully Reversible Plug-and-Play Kit

• 🏆 Precision-Machined for OEM+ Fitment

• 🛡️ Backed by Lifetime Warranty